China’s leading microblog tool Weibo is developing processes to increase control of user-generated content, the Financial Times reported. “Over the past two to three months, we have been looking into how to establish a trust system,” said Charles Chao, chief executive at internet portal Sina (SINA.NASDAQ), which runs Weibo. Chao said microblogs pose a “very serious challenge” for government efforts to filter information, and that many rumors spread through Weibo have created “huge damage” to individuals and to the government. He said Weibo is developing a penalty system to punish bloggers who “spread malicious rumors.” Weibo was recently used to organize protests against a petrochemical factory in Dalian and has served as a focal point for protests over government handling of the infamous high-speed train crash outside Wenzhou. It appears that control has already intensified in response. Chen Yizhong, founder and former editor-in-chief of the Southern Metropolis Daily, one of the most respected mainland newspapers, said he has found his microblog posts delayed, hidden from other users or in some cases, completely erased.